Liquid crystal composition, liquid crystal element, and liquid crystal display device

Abstract

A novel liquid crystal composition that can be used for a variety of liquid crystal devices is provided. A stable liquid crystal element that is driven at low voltage and that withstands physical impact is provided with the use of the novel liquid crystal composition. A highly reliable liquid crystal display device with low power consumption and high display quality is provided with the use of the liquid crystal element. The liquid crystal composition exhibits a blue phase and contains nematic liquid crystal, 1,4:3,6-dianhydro-2,5-bis[4-(n-hexyl-1-oxy)benzoic acid]sorbitol (abbreviation: ISO-(6OBA) 2 ) represented by the structural formula (100) as a first chiral agent, and (4R,5R)-4,5-bis[hydroxy-di(phenanthren-9-yl)methyl]-2,2-dimethyl-1,3-dioxolane (abbreviation: R-DOL-Pn) represented by the structural formula (101) as a second chiral agent.

What is claimed is: 
     
       1. A liquid crystal composition comprising:
 a liquid crystal; 
 1,4:3,6-dianhydro-2,5-bis[4-(n-hexyl-1-oxy)benzoic acid]sorbitol represented by a structural formula (100) as a first chiral agent; 
 (4R,5R)-4,5-bis[hydroxy-di(phenanthren-9-yl)methyl]-2,2-dimethyl-1,3-dioxolane represented by a structural formula (101) as a second chiral agent; and 
 
       
         
           
           
               
               
           
         
         a polymerizable monomer and a polymerization initiator. 
       
     
     
       2. The liquid crystal composition according to  claim 1  exhibiting a blue phase. 
     
     
       3. The liquid crystal composition according to  claim 1  having a temperature range within which a blue phase appears higher than 3.9° C. and lower than 5.1° C. 
     
     
       4. The liquid crystal composition according to  claim 1  having a helical twisting power of 80 μm −1  or higher. 
     
     
       5. A liquid crystal element comprising:
 a first substrate and a second substrate facing each other; 
 a pair of electrodes configured to apply an electric field between the first substrate and the second substrate; 
 a liquid crystal composition between the first substrate and the second substrate, the liquid crystal composition comprising:
 a liquid crystal; 
 1,4:3,6-dianhydro-2,5-bis[4-(n-hexyl-1-oxy)benzoic acid]sorbitol represented by a structural formula (100) as a first chiral agent; and 
 (4R,5R)-4,5-bis[hydroxy-di(phenanthren-9-yl)methyl]-2,2-dimethyl-1,3-dioxolane represented by a structural formula (101) as a second chiral agent; and 
 
 a polymer contained in the liquid crystal composition 
 
       
         
           
           
               
               
           
         
       
     
     
       6. The liquid crystal element according to  claim 5 , wherein the liquid crystal composition exhibits a blue phase. 
     
     
       7. The liquid crystal element according to  claim 5 , wherein the liquid crystal composition has a temperature range within which a blue phase appears higher than 3.9° C. and lower than 5.1° C. 
     
     
       8. The liquid crystal element according to  claim 5 , wherein the liquid crystal composition has a helical twisting power of 80 μm −1  or higher. 
     
     
       9. The liquid crystal element according to  claim 5 , wherein a blue phase keeps appearing after a pressing force endurance test. 
     
     
       10. The liquid crystal element according to  claim 5 , wherein a blue phase keeps appearing after pressing a curved surface of a hemisphere having a diameter of 0.5 mm on one of the substrates with a force of 3 N for about 3 s. 
     
     
       11. The liquid crystal element according to  claim 5 , wherein a blue phase keeps appearing after pressing a curved surface of a hemisphere having a diameter of 0.5 mm on one of the substrates with a force of 10 N for about 3 s. 
     
     
       12. A liquid crystal display device comprising the liquid crystal element according to  claim 5 . 
     
     
       13. A liquid crystal display module comprising:
 a first substrate and a second substrate facing each other; 
 a pixel portion comprising a pair of electrodes configured to apply an electric field between the first substrate and the second substrate; 
 a driver circuit configured to drive the pixel portion; 
 a connector configured to connect the driver circuit to an external circuit; 
 a liquid crystal composition between the first substrate and the second substrate, the liquid crystal composition comprising:
 a liquid crystal; 
 1,4:3,6-dianhydro-2,5-bis[4-(n-hexyl-1-oxy)benzoic acid]sorbitol represented by a structural formula (100) as a first chiral agent; and 
 (4R,5R)-4,5-bis[hydroxy-di(phenanthren-9-yl)methyl]-2,2-dimethyl-1,3-dioxolane represented by a structural formula (101) as a second chiral agent; and 
 
 a polymer contained in the liquid crystal composition 
 
       
         
           
           
               
               
           
         
       
     
     
       14. The liquid crystal display module according to  claim 13 , wherein the liquid crystal composition exhibits a blue phase. 
     
     
       15. The liquid crystal display module according to  claim 13 , wherein the liquid crystal composition has a temperature range within which a blue phase appears higher than 3.9° C. and lower than 5.1° C. 
     
     
       16. The liquid crystal display module according to  claim 13 , wherein the liquid crystal composition has a helical twisting power of 80 μm −1  or higher. 
     
     
       17. The liquid crystal display module according to  claim 13 , wherein a blue phase keeps appearing after a pressing force endurance test. 
     
     
       18. The liquid crystal display module according to  claim 13 , wherein a blue phase keeps appearing after pressing a curved surface of a hemisphere having a diameter of 0.5 mm on one of the substrates with a force of 3 N for about 3 s. 
     
     
       19. The liquid crystal display module according to  claim 13 , wherein a blue phase keeps appearing after pressing a curved surface of a hemisphere having a diameter of 0.5 mm on one of the substrates with a force of 10 N for about 3 s. 
     
     
       20. A liquid crystal display device comprising the liquid crystal display module according to  claim 13 .